Patent application number | Description | Published |
20080279296 | METHOD FOR TRANSMITTING CONTROL INFORMATION, AND METHOD FOR GENERATING CODEWORD FOR THE SAME - A method for transmitting downlink control information and a method for generating a codeword for the same are disclosed. In generating a long code having a low code rate, a basic code of which minimum distance between codes is maximized is repeated by a prescribed number of times and bits of the repeated code are adjusted. Therefore, a minimum distance condition between codes of a long code is satisfied and simultaneously the code can be simply generated. Furthermore, control information can be transmitted with a low error rate by using the generated code. | 11-13-2008 |
20090097466 | METHOD FOR TRANSMITTING UPLINK SIGNALS - A method for transmitting uplink signals, which include ACK/NACK signals, control signals other than the ACK/NACK signals, and data signals, is disclosed. The method comprises serially multiplexing the control signals and the data signals; sequentially mapping the multiplexed signals within a specific resource region in accordance with a time-first mapping method, the specific resource region including a plurality of symbols and a plurality of virtual subcarriers; and arranging the ACK/NACK signals at both symbols near symbols to which a reference signal of the plurality of symbols is transmitted. Thus, the uplink signals can be transmitted to improve receiving reliability of signals having high priority. | 04-16-2009 |
20090168904 | CHANNEL CODING METHOD OF VARIABLE LENGTH INFORMATION USING BLOCK CODE - A channel coding method of variable length information using block code is disclosed. A method for channel-coding information bits using a code generation matrix including 32 rows and A columns corresponding to length of the information bits includes, channel-coding the information bits having “A” length using basis sequences having 32-bit length corresponding to columns of the code generation matrix, and outputting the channel-coded result as an output sequence. If “A” is higher than 10, the code generation matrix is generated when (A−10) additional basis sequences were added as column-directional sequences to a first or second matrix. The first matrix is a TFCI code generation matrix composed of 32 rows and 10 columns used for TFCI coding. The second matrix is made when at least one of an inter-row location or an inter-column location of the first matrix was changed. The additional basis sequences satisfy a value 10 of a minimum Hamming distance. | 07-02-2009 |
20090175361 | CHANNEL CODING METHOD OF VARIABLE LENGTH INFORMATION USING BLOCK CODE - A channel coding method of variable length information using block code is disclosed. A method for channel-coding information bits using a code generation matrix including 20 rows and A columns corresponding to length of the information bits includes, channel-coding the information bits having “A” length using basis sequences having 20-bit length corresponding to columns of the code generation matrix. If “A” is 10, individual basis sequences of the code generation matrix correspond to column-directional sequences of a specific matrix composed of 20 rows and 10 columns. The specific matrix is made from 20 rows of the (32,10) code matrix used for TFCI coding were selected. | 07-09-2009 |
20090209247 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 08-20-2009 |
20100034093 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION BASED ON DIFFERENTIAL SCHEME - A method for transmitting channel quality information based on a differential scheme is disclosed. When channel quality information of a predetermined number of sub-bands selected by a receiver in a frequency selective channel is transmitted, total average channel information is transmitted. Channel information of the selected sub-bands is transmitted as sub-band differential information associated with average channel information. In this case, the sub-band differential information may be denoted by a specific value contained in a differential-value range including only positive (+) values. If at least two channel quality information is transmitted by a MIMO system, channel quality information of one channel is transmitted, then channel quality information of the other channel is transmitted as spatial differential information. In this case, the spatial differential information is denoted by a specific value contained in a differential-value range asymmetrical on the basis of “0”. | 02-11-2010 |
20100039928 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNALS USING MULTI-ANTENNA - A method and apparatus for allowing a UE to transmit uplink signals using a MIMO scheme are disclosed. In order to maintain good Peak power to Average Power Ratio (PAPR) or Cubic Metric (CM) properties when the UE transmits uplink signals using the MIMO scheme, the UE uses a preceding scheme based on a preceding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission. | 02-18-2010 |
20100061303 | METHOD FOR TRANSMITTING CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM - In a mobile communication system using both a discontinuous transmission scheme and a compressed mode transmission scheme, if a preamble and/or a postamble of a channel including control information for transmitting a specific channel overlaps a compressed mode (CM) gap, an overall transmission unit is not transmitted or remaining signals of the transmission unit excluding the preamble and/or the postamble overlapping the CM gap are transmitted. | 03-11-2010 |
20100067441 | METHOD OF TRANSMITTING AND RECEIVING FRAME IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more particularly, to a method of transmitting and receiving frame in a wireless communication system. | 03-18-2010 |
20100074237 | METHOD FOR TRANSMITTING AND IDENTIFYING TRANSMIT POWER VALUE IN MULTI-USER MIMO - A method for transmitting and identifying a transmit power value in a multi-user MIMO scheme is disclosed. The transmit power value transmission method includes calculating available transmit power ratios for respective layers, reducing a number of bits used to represent entire transmit power ratio values by allocating same bit value to a plurality of same transmit power ratio values among the calculated transmit power ratio values for the respective layers; quantizing a transmit power ratio values of symbols to be transmitted to the UE using the entire transmit power ratio values of the reduced number of bits; and transmitting the quantized transmit power ratio values to the UE. | 03-25-2010 |
20100091735 | APPARATUS AND METHOD OF TRANSMITTING AND RECEIVING DATA IN SOFT HANDOFF OF A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method of transmitting and receiving data in soft handoff of a wireless communication system. According to an aspect of the present invention, in the method of receiving data in soft handoff of a wireless communication system, a mobile station receives a first sequence being generated by interleaving transmission data using a first interleaver pattern, and also receives a second sequence being generated by interleaving the transmission data using a second interleaver pattern. Then, the mobile station combines and decodes the first sequence and the second sequence before receiving an entire frame having the first sequence allocated thereto. | 04-15-2010 |
20100098005 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 04-22-2010 |
20100103881 | METHOD FOR TRANSMITTING CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM - In a mobile communication system using both a discontinuous transmission scheme and a compressed mode transmission scheme, if a preamble and/or a postamble of a channel including control information for transmitting a specific channel overlaps a compressed mode (CM) gap, an overall transmission unit is not transmitted or remaining signals of the transmission unit excluding the preamble and/or the postamble overlapping the CM gap are transmitted. | 04-29-2010 |
20100111065 | METHOD FOR TRANSMITTING DOWNLINK REFERENCE SIGNALS IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - A method for transmitting downlink reference signal in a multi-antenna wireless communication system is disclosed. The method includes allocating RSs for a first antenna group to a subframe having a predetermined area with different access levels for user equipments having different access capabilities, pairing RSs for a second antenna group with RSs for the first antenna group, allocating the paired RSs to the predetermined area of the subframe in code division multiplexing, and transmitting the subframe on the downlink. | 05-06-2010 |
20100182988 | SIGNAL TRANSMISSION METHOD USING CDM AGAINST THE EFFECT OF CHANNEL ESTIMATION ERROR IN TRANSMIT DIVERSITY SYSTEM - A method of transmitting a signal using code division multiplexing (CDM) in order to reduce the influence of channel estimation error in a multi-input multi-output antenna (MIMO) system using transmit diversity is disclosed. That is, the method of transmitting a signal by a transmitter using a plurality of antennas includes code division multiplexing input symbols using codes according to a predetermined spreading matrix, and transmitting the code division multiplexed symbols via the plurality of antennas according to an Alamouti scheme. At this time, the predetermined spreading matrix is set such that a first component and a second component configuring interference due to channel estimation error have orthogonal phases. | 07-22-2010 |
20100233968 | METHOD FOR GENERATING AND TRANSMITTING CHANNEL QUALITY INDICATOR BASED ON ADJACENT BAND SELECTION SCHEME - A method of generating and transmitting a channel quality indicator is disclosed, by which a feedback size of channel quality information is reduced. The present invention includes selecting at least one subband by considering a channel quality of each of entire subbands formed by grouping a predetermined number of subcarriers, additionally selecting subbands adjacent to the at least one subband selected in the first selection step, and generating the channel quality indicator corresponding to the subbands selected in the first selection step and the second selection step. | 09-16-2010 |
20100272209 | METHODS OF JOINT CODING IN MOBILE COMMUNICATION SYSTEM - A joint coding method in a mobile communication system is disclosed. To block-code kχ-bit first data requiring a received signal quality and k2˜bit second data requiring a different received signal quality, the present invention includes configuring a first block code generation matrix meeting a first minimum hamming distance, configuring a second block code generation matrix meeting a second minimum hamming distance, and configuring a third block code generation matrix including the first block code generation matrix, the second block code generation matrix and a zero matrix of a specific size. Accordingly, the present invention encodes and transmits two data requiring different received signal qualities by one coding scheme, thereby enabling each data to have the required received signal quality in decoding. | 10-28-2010 |
20110077039 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 03-31-2011 |
20110080888 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 04-07-2011 |
20110237270 | METHOD FOR TRANSMITTING REFERENCE SIGNALS IN A DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - In a system having a plurality of cells participating in a Coordinated Multi-Point (CoMP) operation, a method for transmitting Reference Signals (RSs) to User Equipment (UE) includes generating, by Base Station (BS) included in each of the plurality of cells, a subframe including RSs for a UE located in the each of the plurality of cells, and transmitting the generated subframe to the UE by the BS. The RSs include RSs for channel measurement, and RSs for data demodulation, the plurality of cells are grouped according to frequency shift values applied to the RSs for channel measurement and RS allocation patterns are determined for two cells among the plurality of cells according to a predetermined rule. | 09-29-2011 |
20110243026 | METHOD WHEREBY A CHANNEL QUALITY INDICATOR IS FED BACK BY A TERMINAL IN A MULTIPLE-ANTENNA WIRELESS COMMUNICATION SYSTEM, AND A DEVICE THEREFOR - Disclosed is a method whereby a channel quality indicator is fed back by a terminal in a multiple-antenna wireless communication system. More specifically, the method comprises the steps of: receiving reference signals corresponding to a plurality of data streams from a base station; using the reference signals to calculate a channel quality indicator; and transmitting the calculated channel quality indicator to the base station; and, in the step in which the channel quality indicator is calculated, the channel quality indicator is calculated under the assumption that at least one of the reference signals has been transmitted using wither the spatial-multiplexing technique or the transmit diversity technique, depending on the feedback setting of the terminal. | 10-06-2011 |
20110274005 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 11-10-2011 |
20110274079 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 11-10-2011 |
20120014242 | METHOD OF ALLOCATING RESOURCES FOR TRANSMITTING UPLINK SIGNAL IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of allocating resources for transmitting a signal in a Multiple-Input Multiple-Output (MIMO) wireless communication system is disclosed. The method includes allocating one or more spatial resources of a plurality of spatial resources corresponding to first Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbols to a first transport block, allocating one or more other spatial resources of the plurality of spatial resources corresponding to the first SC-FDMA symbols to a second transport block, and allocating spatial resources corresponding to second SC-FDMA symbols to the first transport block and the second transport block. | 01-19-2012 |
20120033540 | METHOD FOR GENERATING REFERENCE SIGNAL SEQUENCE IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present application discloses a method in which a base station transmits a reference signal sequence in a wireless communication system. In detail, the method comprises the steps of: generating a pseudo-random sequence using a first m-sequence and a second m-sequence; generating the reference signal sequence using the pseudo-random sequence; and transmitting the reference signal to a mobile station via antenna ports different from one another. The second m-sequence has an initial value containing parameters for discriminating reference signal sequences among users. | 02-09-2012 |
20120057451 | METHOD OF RETRANSMISSION FOR SUPPORTING MIMO IN SYNCHRONOUS HARQ - A method for retransmitting data in synchronous Hybrid Automatic Repeat reQuest (HARQ) to support Multiple Input Multiple Output (MIMO) is disclosed. The method includes transmitting a plurality of unit data blocks to a receiver, receiving from the receiver a control channel signal including first feedback information indicating whether the transmission of the plurality of unit data blocks is successful, and retransmitting at least one of the plurality of unit data blocks according to a predetermined order, each unit data block in one Transmission Time Interval (TTI), if a rank is 1 and the first feedback information indicates that the transmission of the plurality of unit data blocks is failed. | 03-08-2012 |
20120057562 | METHOD FOR RECEIVING DOWNLINK SIGNAL IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed in a method for a terminal to receive a downlink signal in a multi user MIMO (MU-MIMO) wireless communication system. More specifically, the method comprises the steps of: receiving downlink control information (DCI) from a base station; obtaining a parameter for a downlink demodulating-reference signal (DM-RS) included in the downlink control information; receiving the downlink DM-RS specified to the terminal on the basis of the parameter; and receiving a downlink data signal on the basis of the downlink DM-RS specified in the terminal, wherein the parameter includes information on a rank which is set in the terminal and a logical antenna port in which the downlink DM-RS is defined. | 03-08-2012 |
20120063438 | METHOD FOR TRANSMITTING DATA BY APPLYING PRECODING MATRIX IN AN OPEN LOOP MIMO SYSTEM - A method for transmitting data by applying a precoding matrix in an open-loop multiple input multiple output (MIMO) system is disclosed. The method comprises selecting a precoding matrix and applying the selected precoding matrix to data during initial transmission; selecting a precoding matrix and applying the selected precoding matrix to data to be retransmitted; and retransmitting the data to which the precoding matrix is applied, wherein an index of the precoding matrix applied to the data is determined based on the times of current retransmission times of the data and index of the precoding matrix applied during initial transmission of the data. | 03-15-2012 |
20120093197 | METHOD AND APPARATUS FOR TRANSMITTING ENCODED SIGNALS WITH FREQUENCY HOPPING ENVIRONMENT - This document is related to a wireless communication system, and more particularly to a method and an apparatus for transmitting encoded signals with frequency hopping environment. A method of transmitting signals by a user equipment (UE) comprises: encoding an input signal having a length of (A) bits by using (A) basis sequences having a length of 20 bits to output an encoded signal having a length of 20 bits, wherein (A) is a natural number less than 14; mapping the encoded signal having the length of 20 bits to two different resource regions, wherein the first 10 bits of the encoded signal are mapped to a first resource region, and the second 10 bits of the encoded signal are mapped to a second resource region; and transmitting the resource-mapped signals to a Node B, wherein the encoded signal or the (A) basis sequences are cyclic shifted with a value of (x) before mapping the encoded signal to the two different resource regions, wherein (x) is a natural number less than 20. | 04-19-2012 |